board/dave/PPChameleonEVB/flash.c

   1 /*
   2  * (C) Copyright 2001
   3  * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/ppc4xx.h>
  10 #include <asm/processor.h>
  11
  12 /*
  13  * include common flash code (for esd boards)
  14  */
  15 #include "../common/flash.c"
  16
  17 /*-----------------------------------------------------------------------
  18  * Functions
  19  */
  20 static ulong flash_get_size (vu_long * addr, flash_info_t * info);
  21 static void flash_get_offsets (ulong base, flash_info_t * info);
  22
  23 /*-----------------------------------------------------------------------
  24  */
  25
  26 unsigned long flash_init (void)
  27 {
  28 #ifdef __DEBUG_START_FROM_SRAM__
  29         return CONFIG_SYS_DUMMY_FLASH_SIZE;
  30 #else
  31         unsigned long size;
  32         int i;
  33         uint pbcr;
  34         unsigned long base;
  35         int size_val = 0;
  36
  37         debug("[%s, %d] Entering ...\n", __FUNCTION__, __LINE__);
  38         debug("[%s, %d] flash_info = 0x%p ...\n", __func__, __LINE__,
  39                                                 flash_info);
  40
  41         /* Init: no FLASHes known */
  42         for (i=0; i<CONFIG_SYS_MAX_FLASH_BANKS; ++i) {
  43                 flash_info[i].flash_id = FLASH_UNKNOWN;
  44         }
  45
  46         /* Static FLASH Bank configuration here - FIXME XXX */
  47
  48         debug("[%s, %d] Calling flash_get_size ...\n", __FUNCTION__, __LINE__);
  49         size = flash_get_size((vu_long *)FLASH_BASE0_PRELIM, &flash_info[0]);
  50
  51         if (flash_info[0].flash_id == FLASH_UNKNOWN) {
  52                 printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
  53                         size, size<<20);
  54         }
  55
  56         debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
  57
  58         /* Setup offsets */
  59         flash_get_offsets (-size, &flash_info[0]);
  60         debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
  61
  62         /* Re-do sizing to get full correct info */
  63         mtdcr(EBC0_CFGADDR, PB0CR);
  64         pbcr = mfdcr(EBC0_CFGDATA);
  65         mtdcr(EBC0_CFGADDR, PB0CR);
  66         base = -size;
  67         switch (size) {
  68         case 1 << 20:
  69                 size_val = 0;
  70                 break;
  71         case 2 << 20:
  72                 size_val = 1;
  73                 break;
  74         case 4 << 20:
  75                 size_val = 2;
  76                 break;
  77         case 8 << 20:
  78                 size_val = 3;
  79                 break;
  80         case 16 << 20:
  81                 size_val = 4;
  82                 break;
  83         }
  84         pbcr = (pbcr & 0x0001ffff) | base | (size_val << 17);
  85         mtdcr(EBC0_CFGDATA, pbcr);
  86         debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
  87
  88         /* Monitor protection ON by default */
  89         (void)flash_protect(FLAG_PROTECT_SET,
  90                             -CONFIG_SYS_MONITOR_LEN,
  91                             0xffffffff,
  92                             &flash_info[0]);
  93
  94         debug("[%s, %d] Test point ...\n", __FUNCTION__, __LINE__);
  95         flash_info[0].size  = size;
  96
  97         return (size);
  98 #endif
  99 }